Lubricating system



Sepa, 2, @924g www@ F. G.. FOLBERTH ET L LUBRICTIG SYSTEM Filed Nov- 28. 1921 2 shame-sneu l A $5 Mwmm Mmmm Sept. 2, 119240 2 Sheats-Shem 2 Ill-v F. G. FOLBERTH ET Al.v

LUBRICATING SYSTEM Filed Nov. 28 l @Hornet Patented Sept. 2, 1924.

UNETED STATES PATENT OFFICE.

FRED G. FOLBERTH AND WILLIAM. M. FOLBER'IVH, 0F CLEVELAND, OHIO, ASSIGNORS TO THE FOLBERTH AUTO SPECIALTY COMPANY, F CLEVELAND, OHIOQA COR- PORATION 0F OHIO.

LUBRICATING SYSTEM.

Application ledi November 2B, 1921. Serial No. 518,846.

To all whom it may concern." i

Be it known that we, Fimo G. FOLBnR'rH and WILLIAM M. Fornnn'rn, citizens yof the United States, residing at Cleveland., in the county of Cuyahoga and State of Uhio,

have invented certain new and useful 1mprovements in Lubricating Systems, of which the following is a specification.

IThis invention relates to lubricating systems for vacuum pumps and comprises a construction wherein the pump is mounted in a casing, and means are provided for lubricating the gears of the pump and the drive shaft.

In' the present invention, we provide a tank adapted to contain a quantity of oil and mount the pump casing in the top of the tank. The intake side of the pump is connected with any apparatus or container from which air is to be exhausted and a branch pipe ext/ends into the body of oil in the bottom ci' the casing, whereby a quantity of oil is mixed with the air passing through the pump and thus lubricates the gears-.r From the outlet side of the pump, the oil and air are conveyed throu h a assage and delivered around the drive s luft to lubricate it, and are thence passed through openings in the casing which pel*- mits the oil to return to the bottom of the tank and the air to exhaust through a suitable opening. The lubricati system is capable of use in many di erent ways wherein vacuum pumps ef the gear type are employed, and is particularly useful in connection with small apparatus, such as a demonstrating apparatus used for demonstrating automaticall controlled vacuum operated wind-shield ceaners. When employed in this, connection, the cylinder of the cleaner motor is connected to the intake pipe of the vacuum tank and the demonstrating apparatus may be run indefinitely with a given charge of oil in the bottom of the tank and further attention to lubrieating requirements is unnecessary.

In the accompanying drawings, we have shown one embodiment of the invention. In this showing:

Figurel is a perspective view of the device9 Fi re 2 is a detail view of the pump shaf and motor disassembled,

Figure 3 is a vertical sectional view through the tank and motor casing,

Figure 4 is a detail sectional view on line 4--4 of Figure 3,

Figure 5 is a vertical sectional view on line 5 5 of Figure 3, and,

Figure 6 is a horizontal sectional view on line 6-6 of Figure 3.

Referring to the drawings, the reference numeral 1 designates a tank of any suitable type provided with a removable, air-tight lid 2. This tank is adapted to contain a body of oil indicated at 3. A suitable exhaust opening is arranged at any point above the oil level and is provided with an outlet pipe 1. A ump casin 5 is mounted fp g 70 in the cover o the tank and exterids through an opening therein. The lower side of the pump casing is closed by a removable plate 6, held in place by screws 7.

pair of gears 8 and 9 are arranged within the pump casing and mesh with each other. One of these gears is mounted on a stub shaft 10, which is journaled in the, walls of the casing. The other gear is provided with an elongated shaft 11 forming a drive shaft. The upper end of this shaft is provided with a notch 12. A motor 13, herein shown as an electnic motor, is adapted to be arranged within the portion of the pump casing extending through the top of the tank and the motor shaft 14 is provided with a projecting rib 15, adapted to be received in the notch 12. The motor is retained in position by means of a set screw 16.

The casing is provided with an inlet pipe 17, the `outer end of which is connected to a conduit leading to any apparatus from which the air is to be exhausted. The inner end of pipe 17 is connected to a port 19 extending downwardly through -the casing to the gear chamber at the inlet side of the pump. A second pipe 20 extends into this chamber, the outer end of the pipe 20 being immersed in the oil in the bottom of the tank. The mixture of air and oil drawn in by the suction of the pump passes around the pump casing in the space between the gear teeth in theusual manner to the outlet side. The outlet side of the pump communicates with a chamber 21 having a passage 22 extending therefrom. This passage extends toward the drive shaft and communicates with a recess 23 around the drive shaft. Suflicient oil passes through this passage to lubricate the drive shaft, and a portion of the oil seeps through from the recess 23 downwardly, lubricating the drive shaft 'below the recess. The ma]or portion of the air and oil is discharged through passages 29, extending outwardly through the pump casing, whence the oil fiows to the bottom of the tank and the air passes off vthrough pipe 4.

A portion of the oil in the recess 23 is also forced upwardly around the drive shaft to a chamber 25, surrounding the junction of the motor shaft and drive shaft. This chamber is provided with a port or passage 26, extending to the outside of the pump cashe operation of the device will be apparent from the foregoing description. When the motor drives the pump, suction is created on the inlet side, drawing air through passage 19 and oil through pipe 20. This air and oil passes around the exterior of the gears in the space between the teeth as the gears revolve to the outlet side of the pump whence it passes through passage 22 to the recess 23, oiling the shaft. A small quantity of oil flows downwardl around the shaft to lubricate it, and a smal portion flows upwardly to the chamber 25, lubricating the shaft. The major portion of the oil and air flow through the passages 29 to the exterior of the pump casmg, whence the oil is returned to the bottom of the tank.

" advanta es of a low power,

By providing a pump in which the oil is automatically delivered from a reservoir when the pump is running, the necessity of lubricating the pump at frequent intervals is eliminated and one of the principal dishigh speed pump of this c aracter is obviated.

. It is to be understood that the form of our invention herewith shown and described is to be taken as a preferred example of the f same, and that various changes in the shape,

size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

We claim:

1. The combination with a tank and cover, of a pump casing arranged on the inside of said cover and depending therefrom, a shaft arranged in sald casing and project* ing `through said cover, said tank being adapted to contain a quantity of oil, an inlet pipe connected to the inlet side of said pump and extending through said cover, a branch pipe connected thereto and extending downwardly, said branch pipe being adapted to be submerged in the oil in the bottom of said tank, said pump casing being provided with inclined passages extending from the out let side of said pump upwardly toward said shaft, said casing being provided with a recess surrounding said shaft andv communieating with said inclined passage, and being further provided with a passage extending from said recess outwardly to the exterior of said casing.

2. The combination with a tank and cover, of a pump casing arranged on the inside of said cover and depending therefrom, a shaft arranged in said casing and projecting through said cover, said tank being adapted to contain a quantity of oil, an inlet pipe connected to the inlet side of said pump and extending through said cover, a branch pipe connected thereto and extending downwardly, said pump casing being provided with a plurality of recesses surrounding said shaft, said casing being further provided with an inclined passage connecting the outlet side of said pum to the lower of said recesses, said casing eing provided with a passage extending outwardly from said lower recess to the exterior of said casing, and being further provided with a passage extending outwardl from the upper recess to the exterior of sai casing.

In testimony whereof we aix our signatures in presence of two witnesses.

FRED G. FOLBERTH. WILLIAM M. FOLBERTH. Witnesses J. H. NAcU, HERMAN O. LEER. 

